US3440227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of higher lactams
Assignee: ThyssenKrupp Budd Co
•
Filing: 1966-03-31
•
Granted: 1969-04-22
•
Expires: 1986-03-31
Abstract
No abstract record available.
Inventors
- 👤 Bernard O Baum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:11
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2907755A
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US3017392A
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US3017391A
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US3216976A
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US3093618A
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GB900151A
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US3138574A
Cited
US3234152A
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US3309343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |